Cant Get 1985 To Idle Right
12-14-08, 06:11 AM
#1
bambam
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Cant Get 1985 To Idle Right
My 1985 Has An Idle Issue,i Have Adjusted Both Fuel Screws Mixture And Speed On Stock Nikki And The Lowest I Can Get It To Idle Smoothly Is About 1100 Rpm Any Lower The Car Starts To Run Lumpy Like It Wants To Die, And Idling At 1100 It Runs Smooth Except For A Misfire Sound Once In A While,and The Rpms Surge Up And Down Slightly When It Does This Popping, Misfire Sound.could It Be Vacuum Leak Somewhere Or Does It Sound Like Timing Might Be Off?
12-14-08, 08:28 AM
#2
Sounds like a vacuum leak. Is there a weird honking noise when you let off the gas? Remove this hose and check it. https://www.rx7club.com/1st-generation-specific-1979-1985-18/hose-question-750125/
12-14-08, 08:30 AM
#3
I just went threw a high idle issue. You could try some of the things that ended up working for me...
https://www.rx7club.com/1st-generation-specific-1979-1985-18/high-idle-800817/
https://www.rx7club.com/1st-generation-specific-1979-1985-18/high-idle-800817/
12-14-08, 08:39 AM
#5
bambam
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Hissing
Well I Know When I Turn The Car Off There Is A Hissing Sound That Last About 5 Seconds After I Turn Car Off,and The Hissing Sounds Like Its Coming Out Of Brake Booster Is That Normal?
12-14-08, 10:00 AM
#6
Yeah, shutup kid.
No, the booster should hold vacuum for a couple minutes, do your brakes work good or is the pedal stiff? If they're stiff then the diaphragm in the booster has a hole in it causing a big vacuum leak. It could just be the check valve leaking the vacuum back into the line, which wouldnt cause a leak, but if you're car stalled on the highway you'd have no power brakes, or in a turbo car like mine I had no brakes after boosting since this valve was bad, so I just put a PCV valve in the line.
12-14-08, 10:11 AM
#7
bambam
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No, the booster should hold vacuum for a couple minutes, do your brakes work good or is the pedal stiff? If they're stiff then the diaphragm in the booster has a hole in it causing a big vacuum leak. It could just be the check valve leaking the vacuum back into the line, which wouldnt cause a leak, but if you're car stalled on the highway you'd have no power brakes, or in a turbo car like mine I had no brakes after boosting since this valve was bad, so I just put a PCV valve in the line.
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